Effect of carbon dioxide, fertilization and irrigation on loblolly pine branch morphology

Abstract Foliage and wood parameters of branches of 12-year-old loblolly pine (Pinus taeda L.) trees were characterized after 21 months of exposure to fertilizer, irrigation and elevated CO2 treatments. Branches of loblolly pine trees were enclosed in plastic chambers and exposed to ambient, ambient +175 and ambient +350 umol mol–1 CO2 concentrations. Measurements of foliage and wood at the fascicle, flush and branch levels were made at the end of the 21 month study period. The +350 CO2 treatment did not significantly increase fascicle radius or length but did increase the number of fascicles on the first flush. Fertilization significantly increased fascicle radius and length, while irrigation significantly increased number of fascicles and flush length of first flush. The +350 CO2 treatment also significantly increased flush length of the first flush. Significant interaction of fertilization and irrigation with CO2 was observed for fascicle length. Significant interactions of fertilization and irrigation were also observed for flush length, number of fascicles and fascicle length. Observed increases in fascicle radius, fascicle length, number of fascicles and flush length may have been responsible for the significantly higher flush leaf area observed for the all three treatments. Also, a combination of fertilization and irrigation increased leaf area by 82% compared to that in the control when averaged across CO2 treatments. At the branch level +350 CO2 treatment significantly increased shoot length but not the number of flushes on the branch. In general with the exception of bark density and total number of needle scales, neither fertilization nor irrigation had any significant effect on other branch level parameters. Results from this study indicate that with ‘global change’ an increase in CO2 alone may increase leaf area via an increase in flush length and number of fascicles. Combining increases in CO2 with fertilization and irrigation could greatly enhance leaf area which when coupled to observed increases in net photosynthesis as a result of elevated CO2 could greatly increase productivity of loblolly pine trees.

[1]  P. Curtis,et al.  Interacting effects of soil fertility and atmospheric CO2 on leaf area growth and carbon gain physiology in Populus×euramericana (Dode) Guinier. , 1995, The New phytologist.

[2]  P. Vitousek.  Beyond Global Warming: Ecology and Global Change , 1994 .

[3]  N. Sionit,et al.  Long-term atmospheric CO2 enrichment affects the growth and development of Liquidambarstyraciflua and Pinustaeda seedlings , 1985 .

[4]  T. C. Hennessey,et al.  Physiology and genetics of tree growth response to moisture and temperature stress: an examination of the characteristics of loblolly pine (Pinus taeda L.). , 1987, Tree physiology.

[5]  M. Bollmann,et al.  The influence of temperature, nutrient status, and short drought on seasonal initiation of primordia and shoot elongation in Pinusradiata , 1986 .

[6]  M. Mousseau,et al.  Interactive effects of elevated CO(2) and mineral nutrition on growth and CO(2) exchange of sweet chestnut seedlings (Castanea sativa). , 1994, Tree physiology.

[7]  R. Teskey,et al.  Design and performance of branch chambers suitable for long-term ozone fumigation of foliage in large trees , 1991 .

[8]  P. Jarvis,et al.  A branch bag and CO2 control system for long-term CO2 enrichment of mature Sitka spruce [Picea sitchensis (Bong.) Carr.] , 1993 .

[9]  S. J. Zarnochc,et al.  Effects of stand development and weather on monthly leaf biomass dynamics of a loblolly pine ( Pinus taeda L . ) stand , 2004 .

[10]  K. Higginbotham,et al.  Effects of carbon dioxide enrichment and nitrogen supply on growth of boreal tree seedlings. , 1986, Tree physiology.

[11]  E. R. Williams,et al.  Litter-fall in a Pinus radiata forest: the effect of irrigation and fertilizer treatments , 1984 .

[12]  J. Clements.  Shoot responses of young Red Pine to watering applied over two seasons. , 1970 .

[13]  J. A. Fites,et al.  CO2 and water vapor exchange of Pinustaeda in relation to stomatal behavior: test of an optimization hypothesis , 1988 .

[14]  D. Eamus,et al.  The Influence of CO2 Enrichment on Growth, Nutrient Content and Biomass Allocation of Maranthes corymbosa , 1993 .

[15]  S. Liu,et al.  Responses of foliar gas exchange to long-term elevated CO(2) concentrations in mature loblolly pine trees. , 1995, Tree physiology.

[16]  J. Coleman,et al.  Growth responses of seven major co-occurring tree species of the northeastern United States to elevated CO2 , 1990 .

[17]  Thomas M. Hinckley,et al.  THE THEORY AND PRACTICE OF BRANCH AUTONOMY , 1991 .

[18]  E. D. Ford.  The Control of Tree Structure and Productivity Through the Interaction of Morphological Development and Physiological Processes , 1992, International Journal of Plant Sciences.

[19]  M. Küppers,et al.  The influence of CO2 enrichment, phosphorus deficiency and water stress on the growth, conductance and water use of Pinus radiata D. Don , 1988 .

[20]  E. Dufrene,et al.  A branch bag technique for simultaneous CO2 enrichment and assimilation measurements on beech (Fagus sylvatica L.) , 1993 .

[21]  K. Cremer.  Relations between reproductive growth and vegetative growth of Pinus radiata , 1992 .

[22]  P. Stenberg,et al.  Photosynthetic Light Capture and Processing from Cell to Canopy , 1995 .

[23]  B. Drake.  A field study of the effects of elevated CO2 on ecosystem processes in a Chesapeake Bay Wetland , 1992 .

[24]  J. Conroy,et al.  Response of Pinus radiata seedlings to carbon dioxide enrichment at different levels of water and phosphorus: growth, morphology and anatomy , 1986 .

[25]  James H. Torrie,et al.  Principles and procedures of statistics: a biometrical approach (2nd ed) , 1980 .

[26]  P. Tans,et al.  Atmospheric carbon dioxide measurements in the remote global troposphere, 1981-1984 , 1988 .

[27]  P. Garrett,et al.  Fascicle Density and Needle Growth Responses of Red Pine to Water Supply Over Two Seasons , 1973 .

[28]  Robert F. Wittwer,et al.  Annual variation in needle fall of a loblolly pine stand in relation to climate and stand density , 1992 .

[29]  E. D. Ford.  Branching, crown structure and the control of timber production , 1985 .

[30]  Pierce H. Jones,et al.  Growth, dry matter partitioning, and diurnal activities of RuBP carboxylase in citrus seedlings maintained at two levels of CO2 , 1986 .

[31]  A. McDonald,et al.  Response of small birch plants (Betula pendula Roth.) to elevated CO2 and nitrogen supply , 1993 .

[32]  Robert F. Wittwer,et al.  Effects of stand development and weather on monthly leaf biomass dynamics of a loblolly pine (Pinus taeda L. ) stand , 1995 .

[33]  R. Norby,et al.  Effects of Atmospheric CO(2) Enrichment on the Growth and Mineral Nutrition of Quercus alba Seedlings in Nutrient-Poor Soil. , 1986, Plant physiology.

[34]  R. Norby,et al.  Growth dynamics and water use of seedlings of Quercus alba L. in CO2 -enriched atmospheres. , 1989, The New phytologist.

[35]  K. Johnsen.  Growth and ecophysiological responses of black spruce seedlings to elevated CO2 under varied water and nutrient additions , 1993 .

[36]  G. C. Topp,et al.  Time-Domain Reflectometry (TDR) and Its Application to Irrigation Scheduling* , 1985 .

[37]  H. L. Allen,et al.  Leaf Area, Stemwood Growth, and Nutrition Relationships in Loblolly Pine , 1988, Forest Science.

[38]  D. Pollard,et al.  The effects of light intensity, photoperiod, soil moisture potential, and temperature on bud morphogenesis in Picea species , 1977 .

[39]  H. Brix.  Effects of thinning and nitrogen fertilization on branch and foliage production in Douglas-fir , 1981 .

[40]  H. L. Allen,et al.  Effects of carbon dioxide, fertilization, and irrigation on photosynthetic capacity of loblolly pine trees. , 1996, Tree physiology.

[41]  R. Teskey.  A field study of the effects of elevated CO2 on carbon assimilation, stomatal conductance and leaf and branch growth of Pinus taeda trees , 1995 .

[42]  J. Seiler,et al.  Interactive role of elevated CO[sub 2], nutrient limitations, and water stress in the growth responses of red spruce seedlings , 1993 .

[43]  B. Strain,et al.  Effects of CO2 enrichment on growth of Liquidambarstyraciflua and Pinustaeda seedlings under different irradiance levels , 1984 .

[44]  M. Benson,et al.  Dynamics of Pinus radiata foliage in relation to water and nitrogen stress: I. Needle production and properties , 1992 .